Apparatus for the preparation of infusions of coffee and the like



Aug. 18, 1925.

J. L, LEMOINE APPARATUS FOR THE PREPARATION OF INFUSIONS 0F COFFEE AND THE LIKE Filed July 21, 1924 Patented Aug. 18, 1925 UNITED STATES PATENT OFFICE.

JU'LES LOU IS LEMOINE, OF PARIS, FRANCE.

APPARATUS FOR THE PREPARATION OF INFUSIONS 0F COFFEE AND THE LIKE.-

Application filed July 21,

To all whom it may concern-.-

Be it known that I, JULES LOUIS LnMoINn, citizen of the Republic of France, residing at Paris, France, have invented certain new and useful Improvements in Apparatus for the Preparation of Infusions of Coffee and the like, of which the following is a specification.

I The present invention relates to an apparatus for the treatment with boiling water of ground coffee or other similar product.

According to the invention, in this apparat-us the filter in which the ground 1naterial is placed is independent of the water reservoir and is connected in a removable manner to such reservoir by a tight joint. This arrangement thus permits the recipient or filter to be easily separated from the rest of the apparatus and all manipulations, such as replacement of spent ground material by fresh ground material, etc. to'be effected outside the apparatus.

The invention also includes the combination of the preceding apparatus with a donble walled vessel receiving the infusion which leaves the filter, the chamber providedbetween the two walls of the said vessel being connected to the upper water reservoir in such a manner as to provide with the reservoir a closed circuit in which the water circulates by thermo syphon, this arrange ment ensuring the heating by one and the same source of heat of the water in "the said chamber and in the reservoir.

, Apparatuses according to the invention are illustrated by way of example on the accompanying drawing, in which an upper water reservoir a and a lower I Flg. 1 is a vertical section of an apparatus according to the invention.

On a larger scale: I

Fig. 2 shows the tight jointing-device of such apparatus. Fig. 3 shows a jointing device suitable for apparatuses of large size.

The apparatus (Figs. 1 and 2) consists of double-walled water reservoir 6, i. e. formed of two coaxial vessels the larger containing the other and preserving between their. walls and bottoms a certain degree of separation. The upper borders of the two vessels are interconnected by a metal sheet soldered to the walls of the two vessels in such a manher as to close hermetically the space contained between the two vessels; The inner 1924. Serial No. 727,379.

vessel r: is the receiver which receives the in- 7 tubes conduct the coldest Water from the reservoir 0 to the lower portion of the reservoir 7). Thus a circulation of the water by thermesvphon is set up which enables the water to be very rapidly heated.

The coffee filter g is cylindrical. It comprises, in the known manner, a lower sieve 71 and an upper sieve It is so constructed that. its upper end can be applied snugly against an india rubber washer j (Figs. 1 and 2). Pressure exerted on the body of the filter 7 makes a tight joint against the washer j. The washer j (Figs. 1 and 2) is held in an annular channel It the inner flange of which serves as a guide within the filter y for a depth such that the water which fills the filter cannot come into contact with the rubberof the washer, the air trapped at I (Fig. 2) preventing such contact.

In order that thejoint of the filter 9 against the washer j be tight, it is necessary that the filter g bears normally against the washer. Such normal pressure can be applied by a universal joint or other device.

Fig. 1 shows one of these ararngements included in the invention, the description of which is as follows The infusion reservoir 0 is closed by a cover m the top of which forms a funnel. The outer border of the cover m has three notches such'gas n at equal intervals agilrt around the periphery of the cover. On the inner surface of the wall of the receiver 0 are fixed three studs such as 0 at equal distances around the periphery of the wall of 0 and at equal distances from the upper bortical movement of ascent or descent. A m enables such handle 72 (Fig. 1) fixed on manipulation to be effected.

, The funnel constituted by the cover m is perforated at its centre by a hole in which exactly fits the tube 9 of a funnel 1' the upper portion of which formsa flanged platform on which is placed and seated the cofl'eefilter g. A small metal sleeve 3 is sol-- dered on the top of the tube q against the conical port-ion of the funnel '1'. The bottom of the sleeve 8 bears against the central portion of the funnel of the cover m so that the platform funnel r conforms to the movements of ascent and descent of the cover m.

The centre of the bottom of the reservoir a .is perforated with an orifice which can be opened or closed by a plug t with a manipulatin stem. This plug may be replaced by a a cor or other suitable closure device.

A tube at vents the air contained in the filter 9 when the apparatus is set in operation.

Fig. 3 shows a lateral joint suitable for substitution for the jointing washer This alternative joint can be employed when the diameter of the filter g is of large dimension. It comprises an annular endless tube '0 of india rubber, lodged in a suitable recess formed in the annular channel 7: The tube '0 has at oneof its joints a nipple a: in which engages the nozzle of a small pump y which takes Water from the upper reservoir on and delivers same into the annular tube '0.

A small valve 3 is suitably provided to that effect and the piston of the pump 1 is maintained in its end position by a suitable device. The reservoir being in place, the water is forced under pressure into the rubber tube which inflates and makes anhermetic joint against the upper outer surface of the wall of the filter.

The above described apparatus is used in the following manner The reservoirs are filled with water by pouring such water into the reservoir a and the burner f is lighted. The coffee container 9 filled with a sufficient quantity of ground coffee is placed on its seat on the platform fl which occupies the lowest position of its stroke by virtue of a displacement of the handle 72 which has brought the bases of the notches n over the studso. I

The container 9 is then clamped against the washer 7' by manipulating the handle p which causes theinchnesof the notches a to ride on the studs 0 thus forcing the assemblage of funnels to rise until the ressure of the container 9 against the was r y is suflicient to ensure the fluid-tightness of the =]01Ilt. The vertical thrust being effected.

through the centre of the platform funnel r, the clamping of the border of the reservoir 9 against the washer i is effected uniformly at all points of the joint which will thus be perfectly fluid tight.

When the water boils the flame of the burner f is extinguished or diminished, the

plug t is raised, the water flows into e voir c a jacket e of boiling water which keeps the infusion in the receiver 0 at a suitable temperature.-

Afterthe operation, the coflfee container g is lowered by manipulation of the handle 1; and can be withdrawn, cleaned and recharged for another operation.

A tube "w with a cock enables the infusion to be drawn 01f from the receiver 0.

Claims: y 4

1. In an apparatus for the preparation of an infusion of coffee and other similar infusions, a water reservoir, afilter adapted to contain the material to be treated such as ground coffee, a tight joint inter sed be-' tween the water reservoir and t e filter, means for permitting the hot water to flow from the reservoir into the filter, a double walled vessel to receive the infusion passing joint interposed betweenvthe water reservoir and the filter, means for com ressing said joint, means for permitting t e hot water to flow fromthe reservoir into the filter.

3. In an apparatus for the preparation of an infusion of coffee and other similar infusions, a water reservoir communicating freely with the atmosphere, means to heat the reservoir, a filter containingvthe mate- 'rial -to be treated such as ground coffee, a

fluid-tight joint interposed between the water reservoir and the filter, means for permitting the hot water to flow from the reservoir into the filter, a receptacle for collecting the infusion, a container covering said receptacle, means permitting. of raising or loweringsaid container, a second container resting on the first container and serving as a support for the filter. 4. In an apparatus for the reparation ofan infusion of coffee and ot er similar infusions, a water reservoir communicating freely with the atmosphere, means to heat the water in said reservoir, a filter containing the material to be treated such as ground cofiee, a joint interposed between the water reserves an t filter, mews r r m a ting the hot Water to flow from the reservoir infusions, a water reservoir into the filter, a receptacle for collecting the ing the w infusion, a'first container covering said retaining the material to b ceptacle and aving inclined notches, means ground coffee, an annular ri e filter and the coacting with said notches to tighten said between th joint, a second container resting on the first an annular rubber tube a container and serving as a support for the riphery of the filter, mea

- tube with a fluid under p paratus for the preparation 11 of coffee and other similar a water reservoir, 1neans forheatater in said reserv lter.

5. In an apparatus for the preparation of an infusion of cofi'ee or other similar of an infusio infusions, a water reservoir, means to heat infusions, the reservoir, a filter containing the mateing the w rial to be treated such as ground cofi'ee, a taming the material to be closure member forming a tight joint beground coffee, tween the filter and the water reservoir, an between the fil annular ring interposed between the filter an annular rubber tube a and the water reservoir and maintaining riphery of the filter by sai the closure member in position, said ring pump connected on the forming an air chamber interposed between water reservoir and on the liquid of the filter and the closure memannular tube, said pump pe her and thus preventing a contact between ing the water under pressu the liquid and said member.

an apparatus for the preparation of an infusion of colfee, and other similar ater in said reser an annular rin ter and the In testimony whereof I a oil, a filter contreated such as g interposed water reservoir, pplied on the ped annular ring, a one hand to the he other to the rmitting of forc- 7 re into said tube. 45 tfix my signature.

JULES LoUIs LEMOINE.

means for heatvoir, a filter cone treated such as ng interposed Water reservoir, pplied on the pens toinflate said 

